Keystones — Lintel
Five GCSE retrieval questions · 6 November 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
8200000
Answer: 8.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x + 6
Answer: (x - 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 38°. Find opposite
Answer: 10.9cm -
4. Ratio Mixed ratio problems
Express the first part of 5:3 as a fraction in simplest form
Answer: 5⁄8 -
5. Statistics Mean
Calculate the mean of: 48, 29, 39, 31, 28, 49, 9
Answer: 33.3